Insulating insert of metal



Patented'A ,lune l, 3.937v

umfrage stares l s032557v msntsrme INSERT `or METAL Hermann von`Forster, Niederursel, near Frankfort-on-the-Main, and Rudolf Haefner, Frankfort-on-the-Main-Heddernheim, Germany, as-

sign

ors to Vereinigte Deutsche Metallwerke Aktiengesellschaft, Frankfort on the Main, Germany, a corporation of Germany Application December 21, 1934, Serial No. 758,548 In Germany December 23, 1933 6 Claims.

similar layers, the insert of the present invention consists of a comparatively thin band-for exa ample 0.1-0.5 mm. thick-bf ductile or forgeable l'5 corrosion-proof sheet metal, applied directly to the substratum that is to be protected (without f any adhesive or other xing layer), preferably by unrolling a continuous strip. The employment of such strips has the advantage that the number of cints, which are especially objectionable and detrimental to the insulation, is greatly reduced. Therefore, the walls or other structures to be protected can be covered with the insulatingA insert almost without leaving any interstices. It has been discovered that very thin sheeting, suchas is 0.2 or 0.1 mm. in thickness, or even less, is sufcient for insulating purposes, provided that care be taken that the strip is quite compact in structure, that is to say impervious to moistureon the one hand, and possesses mechanical strength on the other, so that the strip cannot suffer damageeither when being laid or when in position. I'his condition is fulfilled when the strip exhibits adequate propg5 erties in respect of strength and elongation. In this connection, special importance attaches to a suilicient capacity for deformation (drawing and foi-ging) on the part of the metal employed, so that the thin' strip of metal cannot' be per- 10 forated by irregularities in the'concrete or-mortar substratum, projecting stones, particles of r sand and the', like, or by the pressure set up by thewalls. Smooth and even metal strip that has been subjected for example, to an elonga- 3 tion or stretchingy treatment, and having straight longitudinal) edges, hasbeen found spe-t cially important for maintaining the impervious character of the insert.

Thelnvention will be more fully understood by referring to the accompanying drawing which illustrates a vertical and fragmentary sectional view of a structure embodying the principles of the present invention.

Between a base A and a superstructure B both comprisinglbrickwork- C and layers of mortar D,

(Cl. 'We-127) an insulating and water-proofing layer is provided constituted of thin metal sheet or strip E which is made'of copper, copper alloys, nickel, nickel alloys, aluminum, aluminum alloys, or the like. As appears from the drawing, the insulating and waterproofing strip covers the full surface of thebase and of the superstructure including the plaster F on the outer ysurface of the structure. The insulating metallic strip is in direct contact with the surfaceof both the base and the superstructure without the use of an adhesive. Due to its ductility, elasticity and strength, the metallic strip will exactly conform to the small depressions, elevations and other irregularities of the contacting structural surfaces without being perforated by the pressure of the superstructure and will provide a perfectly impermeable insulating 'and water-proof#` ing layer.

Of'course, the principles of the present invention may be embodied in structures of other types as, for example, of masonry, stonework, concrete, and the like, as those skilled in the art will readily understand. I

In the case of insulation with layers of biturnen (such as asphalt board), the 'only method 'of attachment to pipes, gutters and other del vices for carrying off water, is by cementing, which does not ensure perfect sealing. The conditions are difficult in the case of. the insulating insert of the present invention, by means of Which such connections can be effected without diiiiculty, in a permanently firm 'and durable manner, by lapping. 1j l Since building materials 'such as cement, mortar, concrete and the like, contain substancesalkalis for examplewhich chemically attack metals, and may be leached out by ascending soil water or penetrativewater that is under pressure, the metal strips employed must consist of metal that is as completely corrosionproof as possible. Especially in the thin sheeting-which maybe as little as 0.1 mm., or even less in thickness-that is used for the invention, the resistance of the insert to corrosion becomes of special importance. The insulating insert ,according to the present inventioncounteracts, in various ways, the difliculties arising in the employment of thin sheeting. Thus'metals, such as nickel .or nickel alloysthat resist the actionv of lyes, are preferably employed. It is true that metals of this kind are too expensive for general use, andare therefore applicable in special cases only, but when cheaper metals, such as copper, are employed for the strips, their resistance to of alloys certainly increases the cost of production of thin sheeting. The object of the present invention can, however, be more cheaply attained by providing metals of low resistance to corrosion with a coating of corrosion resistant metal, for example by electroplating copper strip with nickel. In this case, chromium and other suitable metals can also be employed in place of nickel. 'I'he anti-corrosive layer can also be produced by spraying, plating or diiusion, in-

stead of electrical deposition. A further possi-y bility of protection also consists in providing the said metal strips with protective `coatings by oxidation or similar methods. Thus, a protective layer of oxide can be produced on copper strip by immersing same in molten saltpetre. Even a metal, such as aluminium, that oiers but slight resistance to corrosion can be rendered suitable for the purposes of the invention by providing it with a coating of aluminium oxide,

for example by oxidation. In place of a metallic coating, non-metallic coatings also may be provided for protecting the metal strips. This method is generally the cheaper. Coatings of paint, lacquer and the like, protected by a covering layer, of paper, for example, are suitable for this purpose. All these non-metallic coatings can be applied to one or both sides of the metal v strip. In no case do they serve as an adhesive layer for attaching the metal strip to its subor super-stratum:

We claim:-

1. An insulated and Water-proofed structure which comprises a base of brickwork, masonry, stonework, concrete and the like, an insulating and water-proofing layer constituted of a corrosion-resistant metal directly positioned on said base, and a superstructure above and in direct contact with said insulating layer, said metal strips being from about 0.1 mm. to about 0.5 mm. in thickness and having sucient ductility and strength to conform to irregularities of the surface of said base and said superstructure without being perforated.

2. An insulated and water-proofed structure which comprises a base of brickwork, masonry, stonework, concrete, and the like; an insulating and waterproofing layer constituted of long, foldable and corrosion-resistant metallic sheets of foil thickness directly positioned on saidbase; said sheets being thin enough to be ductile and to conform to elevations and depressions of the surrounding structural members and having suicient mechanical strength to resist penetration of said structure; and a superstructure positioned on and in direct contact with said insulating layer.

3. An insulated and water-proofed structure which comprises a base of brickwork, masonry, stonework, concrete and the like; an insulating and water-proofing layer constituted of long, foldable metallic sheets of foil thickness directly positioned on said base; a corrosion-resistant protective coating on said metallic sheets; said sheets being thin enough to be ductile and to conform to elevations and depressions of the surrounding structural members and having suficient mechanical strength to resist penetration of said structure; and a superstructure positioned on and in direct contact with said insulating layer.

4. An insulated and water-proofed structure which comprises a plurality of members of the structure made of brickwork, masonry, stonework, concrete, and the like, having a small space therebetween; and an insulating and waterproofing layer provided in said space consisting of long, rollable metallic sheets of foil thickness constituted at least partly of nickel and in direct contact with'said structural members; said sheets being thin enough to be ductile and to conform to elevations and depressions of the surrounding structural members and having suilicient mechanical strength to resist penetration of said structure.

5. An insulated and Water-proofed structure which comprises a plurality of members of the structure made of brickwork, masonry, stonework, concrete, and the like, having a small space therebetween; and an insulating and Water-proofing layer provided in said space consisting of long, rollable metallic sheets of foil thickness constituted at least partly of copper and in direct contact with said structural members; said sheets being thin enough to be ductile and to conform to elevations and depressions of the surrounding structural members and having suiiicient mechanical strength to resist penetration of said structure.

6. An insulated and water-proofed structure which comprises a plurality of members of the ,structure made of brickwork, masonry, stone- Ywork, concrete, and the like, having a small space therebetween; an insulating Y. and waterproofing layer provided in said space consisting of long, rollable metallic sheets of foil thickness constituted at least partly of aluminum and in direct contact with said structural members; and a corrosion-resistant layer of aluminum oxide on at least one side of said sheets; said sheets being thin enough to be ductile and 'to conform to elevations and depressions of the surrounding structural members and having sufficient mechanical strength to resist penetration of said structure.

HERMANN voN FORSTER.

RUDOLF HAEFNER; 

